Play Chord
==========

*Example script* (scamp): `examples/Tutorial/04_play_chord.py <https://github.com/MarcTheSpark/scamp/blob/main/examples/Tutorial/04_play_chord.py>`__

*Download:* :download:`04_play_chord.py <downloads/tutorial_04_play_chord/04_play_chord.py>`

Demonstrates `ScampInstrument.play_chord` by playing a famous progression, and then playing it a few more times randomly up and down the keyboard.

*Topics:* :doc:`Time & clocks › Forking & simultaneity <time_clocks>`

.. raw:: html

   <div style="margin:0.6em 0"><audio controls preload="none" src="../_static/media/Tutorial/04_play_chord.mp3" style="width:100%;max-width:520px"></audio></div>

.. code-block:: python

   from scamp import *
   import random

   # fixed random seed for reproducibility
   random.seed(42)

   s = Session()
   s.tempo = 72

   piano = s.new_part("piano")

   # a famous chord progression
   piano.play_chord([53, 59, 63, 68], 0.8, 2)
   piano.play_chord([52, 56, 62, 71], 0.6, 1)


   # and then the same progression bouncing up and down the piano
   # oh, and let's accelerate, why not
   set_tempo_target(144, Moment.after_beats(6))
   for _ in range(8):
       t = random.randint(-24, 24)
       piano.play_chord([53 + t, 59 + t, 63 + t, 68 + t], 0.8, 0.5)
       piano.play_chord([52 + t, 56 + t, 62 + t, 71 + t], 0.6, 0.5, "staccato")